Table 6.
Retention of P, AID, ATTD of P, Ca, and InsP6, and STTD of P of experimental diets1–3
| Item | Hull-less barley | SEM | P-value4 | |||||
|---|---|---|---|---|---|---|---|---|
| Control | ACD | Fermented | ||||||
| Without phytase | With phytase | Acid | Fermentation | Phytase | ||||
| P | ||||||||
| AID, % | 68.7 | 70.4 | 69.7 | 79.0 | 4.99 | 0.740 | 0.839 | 0.081 |
| ATTD, % | 71.9 | 75.0 | 78.9 | 86.6 | 3.45 | 0.376 | 0.061 | 0.042 |
| STTD, % | 76.9 | 80.4 | 83.6 | 92.6 | 3.45 | 0.332 | 0.075 | 0.019 |
| Intake, g/d | 3.88 | 4.15 | 4.10 | 4.16 | — | — | — | — |
| Fecal excretion, g/d | 1.03 | 1.03 | 0.83 | 0.56 | 0.127 | 0.979 | 0.130 | 0.051 |
| Urinary excretion, g/d | 0.24 | 0.49 | 0.53 | 0.69 | 0.115 | 0.046 | 0.022 | 0.182 |
| Retention, g/d | 2.61 | 2.63 | 2.73 | 2.90 | 0.159 | 0.924 | 0.457 | 0.309 |
| Retention:intake, % | 66.1 | 64.7 | 67.7 | 70.4 | 4.34 | 0.751 | 0.717 | 0.543 |
| Retention:digestion, % | 91.7 | 86.3 | 86.3 | 81.4 | 2.72 | 0.065 | 0.064 | 0.097 |
| Ca | ||||||||
| AID, % | 89.5 | 90.7 | 91.4 | 93.8 | 1.01 | 0.222 | 0.068 | 0.035 |
| ATTD, % | 89.0 | 93.2 | 92.5 | 95.3 | 1.22 | 0.004 | 0.011 | 0.037 |
1Control barley; ACD, chemically acidified barley; Fermented without phytase, fermented barley with L. reuteri; Fermented with phytase, fermented barley with L. reuteri and 500 FYT phytase/kg barley grain.
2The STTD of P was calculated by correcting the ATTD of P with recommended basal endogenous losses (190 mg P/kg DM intake; NRC, 2012).
3Least squares means based on 7 to 8 pig observations per diet.
4Acid, acid addition (Control vs. ACD); Fermentation, Control vs. Fermented without phytase; Phytase, fermentation with phytase (Fermented without phytase vs. Fermented with phytase).